Stock markets are seeing bigger fluctuations this year amid speculation over signs of accelerating inflation, the pace of Federal Reserve rate increases and U.S. trade tensions with China. That's a relief for JPMorgan and other Wall Street firms following a bout of unusually calm -- and less lucrative -- trading conditions in 2017.

The U.S. economy probably added 185,000 jobs in March while wage gains accelerated, a survey of economists showed, reinforcing the Federal Reserve's case for continuing to increase interest rates gradually to keep inflation from overheating while keeping unemployment low.